mtg faerie cards Magic The Gathering - Macabre Flying When Faerie Miscreant enters the battlefield Faerie Artisans — Commander 2016

1 Cover of Darkness

Halving Season's abilities won't change the number of tokens you create or counters you place, even if you're placing counters on permanents your opponents control

Taking off your opponent creatures activated abilities is strong, and it can fit a prison plan well by disabling lots of commanders and game plans

Also, sacrificing a Mountain is not hard since you might have already used your red card before and you can play mono black easily in madness decks

And that is where basic market dynamics kick in: if on top of that the supply is low because it is a scarce card, if nobody wants to sell it, or if it had a single print run many years ago, then the price can skyrocket